Matches in SemOpenAlex for { <https://semopenalex.org/work/W1966466730> ?p ?o ?g. }
Showing items 1 to 96 of
96
with 100 items per page.
- W1966466730 endingPage "275" @default.
- W1966466730 startingPage "261" @default.
- W1966466730 abstract "Abstract The lattice parameters and structures of the four phases of pure potassium niobate (KNO) have been determined at 10 K intervals between 200 and 823 K. The experiments were performed on the high-resolution powder diffractometer at the neutron spallation source, ISIS facility, Rutherford Appleton Laboratory. A similar experiment performed on barium titanate (BTO) was reported recently. We have analysed the results obtained for KNO in a similar way and make comparisons between the two materials; both show the same sequence of ferroelectric transitions; rhombohedral—orthorhombic—tetragonal—cubic with increasing temperature. As in BTO, the only deformation of the octahedron in KNO is due to electrostrictive coupling between strain and the spontaneous polarisation; other distortions allowed by symmetry are vanishingly small. We have calculated the lattice parameters from an expansion of the Gibbs free energy in even powers of the spontaneous polarisation with excellent agreement with experimental values; the coefficients in the expansion were found by a least-squares technique. Using these values with all sixth-order terms in the expansion the transition temperatures are reproduced well, which was not the case for BTO. Using apparent charges and “absolute” displacements the spontaneous polarisation can be calculated giving excellent agreement with experiment. Analysis of the temperature dependence of the Debye-Waller factors in the cubic phase indicates a softening of the one-particle potential for niobium. The bond valencies of both potassium and niobium show a small, abrupt change at the cubic-tetragonal transition." @default.
- W1966466730 created "2016-06-24" @default.
- W1966466730 creator A5029991765 @default.
- W1966466730 creator A5049325552 @default.
- W1966466730 date "1994-12-01" @default.
- W1966466730 modified "2023-09-26" @default.
- W1966466730 title "Structural study of potassium niobate between 200 and 823 K" @default.
- W1966466730 cites W1607281462 @default.
- W1966466730 cites W1968424778 @default.
- W1966466730 cites W1968859016 @default.
- W1966466730 cites W1976018044 @default.
- W1966466730 cites W1981409196 @default.
- W1966466730 cites W2016260972 @default.
- W1966466730 cites W2020241708 @default.
- W1966466730 cites W2042397903 @default.
- W1966466730 cites W2044831606 @default.
- W1966466730 cites W2052974788 @default.
- W1966466730 cites W2058424157 @default.
- W1966466730 cites W2067116935 @default.
- W1966466730 cites W2068385419 @default.
- W1966466730 cites W2074019256 @default.
- W1966466730 cites W2090318440 @default.
- W1966466730 cites W2166347535 @default.
- W1966466730 doi "https://doi.org/10.1080/01411599408200379" @default.
- W1966466730 hasPublicationYear "1994" @default.
- W1966466730 type Work @default.
- W1966466730 sameAs 1966466730 @default.
- W1966466730 citedByCount "12" @default.
- W1966466730 countsByYear W19664667302012 @default.
- W1966466730 countsByYear W19664667302018 @default.
- W1966466730 countsByYear W19664667302019 @default.
- W1966466730 countsByYear W19664667302021 @default.
- W1966466730 crossrefType "journal-article" @default.
- W1966466730 hasAuthorship W1966466730A5029991765 @default.
- W1966466730 hasAuthorship W1966466730A5049325552 @default.
- W1966466730 hasConcept C115624301 @default.
- W1966466730 hasConcept C120665830 @default.
- W1966466730 hasConcept C121332964 @default.
- W1966466730 hasConcept C133386390 @default.
- W1966466730 hasConcept C149288129 @default.
- W1966466730 hasConcept C170751736 @default.
- W1966466730 hasConcept C185592680 @default.
- W1966466730 hasConcept C191897082 @default.
- W1966466730 hasConcept C192562407 @default.
- W1966466730 hasConcept C207114421 @default.
- W1966466730 hasConcept C26873012 @default.
- W1966466730 hasConcept C2777303380 @default.
- W1966466730 hasConcept C2778853537 @default.
- W1966466730 hasConcept C2908686090 @default.
- W1966466730 hasConcept C37243968 @default.
- W1966466730 hasConcept C49040817 @default.
- W1966466730 hasConcept C507968137 @default.
- W1966466730 hasConcept C73585123 @default.
- W1966466730 hasConcept C79090758 @default.
- W1966466730 hasConcept C8010536 @default.
- W1966466730 hasConceptScore W1966466730C115624301 @default.
- W1966466730 hasConceptScore W1966466730C120665830 @default.
- W1966466730 hasConceptScore W1966466730C121332964 @default.
- W1966466730 hasConceptScore W1966466730C133386390 @default.
- W1966466730 hasConceptScore W1966466730C149288129 @default.
- W1966466730 hasConceptScore W1966466730C170751736 @default.
- W1966466730 hasConceptScore W1966466730C185592680 @default.
- W1966466730 hasConceptScore W1966466730C191897082 @default.
- W1966466730 hasConceptScore W1966466730C192562407 @default.
- W1966466730 hasConceptScore W1966466730C207114421 @default.
- W1966466730 hasConceptScore W1966466730C26873012 @default.
- W1966466730 hasConceptScore W1966466730C2777303380 @default.
- W1966466730 hasConceptScore W1966466730C2778853537 @default.
- W1966466730 hasConceptScore W1966466730C2908686090 @default.
- W1966466730 hasConceptScore W1966466730C37243968 @default.
- W1966466730 hasConceptScore W1966466730C49040817 @default.
- W1966466730 hasConceptScore W1966466730C507968137 @default.
- W1966466730 hasConceptScore W1966466730C73585123 @default.
- W1966466730 hasConceptScore W1966466730C79090758 @default.
- W1966466730 hasConceptScore W1966466730C8010536 @default.
- W1966466730 hasIssue "4" @default.
- W1966466730 hasLocation W19664667301 @default.
- W1966466730 hasOpenAccess W1966466730 @default.
- W1966466730 hasPrimaryLocation W19664667301 @default.
- W1966466730 hasRelatedWork W1965737070 @default.
- W1966466730 hasRelatedWork W1996077681 @default.
- W1966466730 hasRelatedWork W1999600910 @default.
- W1966466730 hasRelatedWork W2004373754 @default.
- W1966466730 hasRelatedWork W2012087457 @default.
- W1966466730 hasRelatedWork W2028657378 @default.
- W1966466730 hasRelatedWork W2030237677 @default.
- W1966466730 hasRelatedWork W2045684959 @default.
- W1966466730 hasRelatedWork W2070501053 @default.
- W1966466730 hasRelatedWork W2949166169 @default.
- W1966466730 hasVolume "52" @default.
- W1966466730 isParatext "false" @default.
- W1966466730 isRetracted "false" @default.
- W1966466730 magId "1966466730" @default.
- W1966466730 workType "article" @default.